>>3440286it surely is that bad.
addressing my first point about resizing your photos:
your photos are than 500kb at 5000 pixels long. there is no reason to do this. nobody here needs to see a full 21 million pixels. small file size is good for bandwidth but bad for quality. size your photo to around 700px L to 1600px L depending on content. no larger. your photo will look much better and much sharper if you size *clap* it *clap* down. there's a reason pro cinematographers shoot at 8k and resize to 1080. there's a reason people run games at 4k but only output 1080. supersampling results in notably higher perceived quality and sharpness. if you still aren't sure why I'm saying this you need to do some googling
as for the blacks. I'm sorry to be such a dick, but have you tried using your eyes? look around the top edge of the Saab. ignoring the blurry sky, pay attention to the heavy banding. the blacks are crushed down to two shades of gray. I can tell it's merged but it looks fucked up. there's no reason for it to look like that. maybe it's just your output compression settings? turn the export quality up. it could have nothing to do with your source images.
